Biology

Plant Propagation Techniques

591 Questions

Plant propagation techniques cover both natural and artificial methods of cultivating plants, including micropropagation, tissue culture, and layering. These botanical concepts evaluate how desirable characteristics are multiplied and transferred into new plants. Questions on this topic routinely feature in the biology segment of various state and central competitive exams.

Micropropagation methodsArtificial vegetative propagationPlant tissue cultureLayering techniquesMeristem differentiation

Plant Propagation Techniques Questions

Multiple choice

Emasculation is technique used in

  1. hybridization

  2. plant monogamy

  3. selection

  4. breeding
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Emasculation is the process of removing anthers from bisexual flowers without affecting the female reproductive part (pistil), which is used in various plant hybridization techniques. Emasculation is performed by plant breeders in bisexual flowers to obtain the desired variety of a plant by crossing a particular plant with the desired pollen grain.

Multiple choice

Directions: In the following question, some statements have been provided. These statements form a coherent paragraph when properly arranged. Select the alternative representing the proper and logical sequencing of these statements.

A. Some naturalists have maintained that all variations are connected with the act of sexual reproduction; but this is certainly an error; that is, of plants which have suddenly produced a single bud with a new and sometimes widely different character from that of the other buds on the same plant.B. As buds on distinct trees, growing under different conditions, have sometimes yielded nearly the same variety, we clearly see that the nature of the conditions is of subordinate importance in comparison with the nature of the organism in determining each particular form of variation. C. They occur rarely under nature, but are far from rare under culture. D. As a single bud out of many thousands produced year after year on the same tree under uniform conditions, has been known suddenly to assume a new character. E. These bud variations, as they may be named, can be propagated by grafts, offsets, etc. and sometimes by seed.

  1. AECDB

  2. BCDEA

  3. ADCBE

  4. BEDCA

  5. ABDEC
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The para is about variations in plant buds; and the concept is introduced in A. ‘These bud variations’ in E would follow A and ‘they occur rarely’ in C follows E. ‘As bud ..on a single tree’ and ‘as buds on distinct trees’ in D and B will be placed together at the end. Hence, AECDB is correct.

Multiple choice

Which of the following techniques can be used to propagate 'Ornamental plants'?

  1. Budding

  2. Fragmentation

  3. Tissue culture

  4. Regeneration
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ornamental plants are very delicate and some of their features make them valuable. It is desired that during their propagation, there should be no change in those traits and also they should remain free from any disease. Both these requirements are met by tissue culture technique. In addition, it helps to produce a large-scale commercial yield. Budding, fragmentation and regeneration cannot serve all these purposes together because they are slow and cannot ensure disease free progeny.

Multiple choice

In which method seeds are scattered by hands?

  1. Transplantation

  2. Broadcasting

  3. Drilling

  4. Manuring
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Transplantation is the placing of a seeding into the field, manuring is the addition of manure; drilling is to sowing seeds by using drill machine and broadcasting refers to scatter the seeds with hands.

Multiple choice

Which of the following invitro methods is used by horticulturists for large scale commercial purposes?

  1. Tissue culture

  2. Natural selection

  3. Budding

  4. Spore formation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Invitro, in Latin, means “in glass”. It refers to biological process occurring usually under experimental conditions, outside the cell or organism body. This holds good for tissue culture and it also gives large-scale commercial yield. On the contrary, natural selection, budding and sporulation are natural, i.e. in-vivo methods and cannot be used for large-scale production.

Multiple choice

Tissue culture is a technique of growing plants by ____________.

  1. natural selection

  2. sexual reproduction

  3. vegetative propagation

  4. spore formation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In tissue culture, the selected cells from shoot tip etc. are allowed to proliferate and form new plants. This process is done under lab conditions and is not a natural method. Since it involves cells from only one plant, it is essentially asexual. There is no formation of spores and instead tiny plantlets are produced. Thus, only option (3) is correct.

Multiple choice

Strawberries are typically propagated asexually by

  1. runners

  2. offset

  3. stolon

  4. sucker

  5. cladophyll
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Runners are horizontally oriented stems that grow along the soil surface. Their function is vegetative production. Example: number of grasses have stolons. Strawberries are normally propagated asexually by two different methods: runners (stolons) and crown division.